/* 全局设计变量定义 - 欧美 B2B 科技感配色 */
        :root {
            --brand-blue: #0066cc;
            --brand-blue-hover: #0052a3;
            --text-dark: #0f172a;
            --text-muted: #475569;
            --bg-light: #f8fafc;
            --success-green: #10b981;
            --border-color: #e2e8f0;
            --radius-lg: 16px;
            --radius-sm: 8px;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
            color: var(--text-dark);
            background-color: #ffffff;
            line-height: 1.5;
            -webkit-font-smoothing: antialiased;
        }

        /* Hero 容器 */
        .hero-section {
            width: 100%;
            max-width: 1440px;
            margin: 0 auto;
            padding: 80px 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 60px;
        }

        /* 左侧：文案与转化区 (AIDA: Attention & Interest) */
        .hero-content {
            flex: 1.1;
            max-width: 680px;
        }

        /* 信任标签：一句话说明身份 */
        .b2b-badge {
            display: inline-flex;
            align-items: center;
            background-color: #e0f2fe;
            color: #0369a1;
            padding: 8px 16px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 24px;
            text-transform: uppercase;
        }

        /* SEO H1：绝对保留已有核心词，仅向后延伸商业词 */
        .hero-content h1 {
            font-size: 48px;
            font-weight: 800;
            line-height: 1.15;
            color: var(--text-dark);
            margin-bottom: 20px;
            letter-spacing: -1px;
        }

        .hero-content h1 span {
            color: var(--brand-blue);
        }

        /* 核心 B2B 痛点引言 */
        .hero-subtitle {
            font-size: 19px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 32px;
        }

        /* 工厂硬核交付能力清单 */
        .capability-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
            margin-bottom: 40px;
        }

        .capability-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-dark);
        }

        .capability-item svg {
            width: 18px;
            height: 18px;
            color: var(--success-green);
            flex-shrink: 0;
        }

        /* 行动导向按钮 (AIDA: Action) */
        .cta-group {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
        }

        .btn-main {
            display: inline-block;
            background-color: var(--brand-blue);
            color: #ffffff;
            padding: 16px 36px;
            border-radius: var(--radius-sm);
            font-size: 16px;
            font-weight: 600;
            text-decoration: none;
            transition: background-color 0.2s ease, transform 0.1s ease;
            box-shadow: 0 4px 12px rgba(0, 102, 204, 0.15);
        }

        .btn-main:hover {
            background-color: var(--brand-blue-hover);
            transform: translateY(-1px);
        }

        .btn-sub {
            display: inline-block;
            color: var(--brand-blue);
            font-size: 16px;
            font-weight: 600;
            text-decoration: none;
            transition: opacity 0.2s ease;
        }

        .btn-sub:hover {
            text-decoration: underline;
            opacity: 0.9;
        }

        /* 右侧：高意图图片展示区 */
        .hero-visual {
            flex: 0.9;
            position: relative;
            width: 100%;
        }

        .image-placeholder {
            width: 100%;
            height: auto;
            aspect-ratio: 14 / 10;
            background-color: #f1f5f9;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            color: #94a3b8;
            font-size: 14px;
            font-weight: 500;
            box-shadow: 0 20px 40px rgba(15, 23, 42, 0.08);
            overflow: hidden;
        }

        /* 实际生产中替换为真实 img 标签，此样式确保响应式比例稳定 */
        .image-placeholder img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }

        /* 响应式断点设计 (针对平板及手机) */
        @media (max-width: 992px) {
            .hero-section {
                flex-direction: column-reverse;
                padding: 60px 24px;
                gap: 40px;
            }

            .hero-content {
                max-width: 100%;
                text-align: center;
            }

            .b2b-badge {
                margin-left: auto;
                margin-right: auto;
            }

            .hero-content h1 {
                font-size: 36px;
            }

            .hero-subtitle {
                font-size: 17px;
            }

            .capability-grid {
                justify-content: center;
                max-width: 500px;
                margin-left: auto;
                margin-right: auto;
            }

            .cta-group {
                justify-content: center;
            }
        }

        @media (max-width: 480px) {
            .capability-grid {
                grid-template-columns: 1fr;
            }
            .btn-main {
                width: 100%;
                text-align: center;
            }
        }